水聲通信系統 的英文怎麼說

中文拼音 [shuǐshēngtōngxìnxìtǒng]
水聲通信系統 英文
hydro-acoustic communication system
  • 水 : 名詞1 （由兩個氫原子和一個氧原子結合而成的液體） water 2 （河流） river 3 （指江、河、湖、海、洋...
  • 通 : 通量詞（用於動作）
  • 系 : 系動詞（打結; 扣） tie; fasten; do up; button up
  • 統 : Ⅰ名詞1 （事物間連續的關系） interconnected system 2 （衣服等的筒狀部分） any tube shaped part of ...
  • 水聲 : 1. [物理學]underwater sound2. （水發出的聲音） sound of water
  • 通信 : communication; communicate by letter; correspond
  • 系統 : 1. （按一定關系組成的同類事物） system 2. （有條理的;有系統的） systematic
  1. " l ' lle brief introduction of underwater acoustic channel and the cl1art of image transmission syste111, innovation of ti1is paper are given in the first chapter. basic technology and hardware using in this project are introduced in the seco11d chaptel transform methods, especially the wavelet transformation are introdtlced il1 the tl1ird cllapter. ii11age ' s coding methods are introduced in cl1apter four, witll tilem ti1e zero tree method is the el11pl1ases

    第一章給出對水聲通道特性簡介以及圖像信息傳輸的系統框圖、本研究創新之處；第二章介紹圖像處理的基本技術以及本研究的硬體環境；第三章介紹圖像數據的變換方法，著重介紹了小波變換涉及到的知識；第四章介紹圖像編碼，重點介紹了零樹法編解碼；第五章介紹本研究的軟體、硬體設計、對零樹法的具體改變。
  2. Meanwhile, shanghai meining computer software co. ltd. s " stock information enquiry ", lingtong net s " ring tone graphics downloading ", wangda group s " mobile office ", beijing yisuode technology co. ltd. and go2map software beijing co. ltd. s " mobile locating system application - crystal ball " and beijing qunsheng technology co. ltd. s " games " won special nomination prizes in this competition

    同時，上海美寧計算機軟體有限公司"股票信息查詢"靈通網"鈴聲圖片下載"網達集團"移動辦公"北京易索得科技有限責任公司及新圖行天下軟體北京有限公司"移動定位系統應用-水晶球"北京群勝網科技有限公司"游戲"等5家公司提交的應用也在此競賽中分別獲得了特別提名獎。
  3. Performance analysis of underwater acoustic digital communication system in a shallow water channel

    淺海通道水聲數字通信系統的性能分析
  4. This system has some functions as following : first, statistic analysis and valuation of the spatial distribution of beijing traffic noise ; second, real - time simulation of the affection that is traffic noise in residential area ; third, previewing statues and standards of environmental noise ; fourth, management of spatial data and property data ; fifth, alternant querying of spatial data and property data ; sixth, inputting graphs and tables. we can build accurate and identical channels of information ' s coming, accelerate the circulation rate of environmental information, and increase the efficiency of environmental information resources by studying and implementing metropolitan environmental noise management information system. meanwhile, it can reduce the burden of these environmental workers

    城市道路交通噪聲信息管理系統的研究與實施可以建立準確、一致的信息來源渠道，加快環境信息的流通速度，提高環境信息資源的利用率，減輕環境工作者的工作負擔，提高環境管理工作中的效率，為環境管理和環境規劃與評價提供依據；該系統的建立與開發同時也為開發類似系統的環境工作者提供參考和借摘要一鑒，為今後實施集水、氣、噪聲、固體廢棄物為一體的環境管理信息系統平臺提供了一個子框架。
  5. As these underwater acoustic communication systems is intended for comparatively short distances, up to 10 - 30 km, problems arise when the submarine operate outside the normal areas, far from the save waters covered by national defence and communication systems

    但是這些水聲通信系統僅僅適用於短距離通信，最遠只能到10 ~ 30千米，如果潛艇在常規水域之外工作，遠離了國家防衛和通信系統所覆蓋的區域，就會出現問題。
  6. And their performances are compared by simulation. the realization of phase - coherent modulation is studied, especially the carrier recovery. in order to improve the system performance, we consider a receiver which performs optimal phase synchronization and channel equalization jointly

    本文詳盡的研究了線性和非線性自適應均衡器的橫向結構和典型演算法（ lms和rls ） ，對其性能進行了模擬比較；對相位相干調制解調技術的實現，尤其是載波恢復的方法進行研究，將載波恢復系統和自適應均衡器的參數調整聯合起來，從而提高相干水聲通信系統的性能。
  7. Hydro - acoustic communication system

    水聲通信系統
  8. In this thesis, a multicarrier modulation high bit - rate underwater acoustic communication system was designed and constructed after analyzing those effects

    本論文在分析這些因素的影響之後，設計並製作完成了一個多載波高速水聲通信系統。
  9. Firstly, some useful experience about designing underwater acoustic communication systems and the properties of underwater acoustic channels are introduced

    論文首先總結了前人關于海洋水聲通信系統設計的經驗，討論了海洋水聲通道的特點。
  10. In this thesis, the characteristics of underwater acoustic channel were analyzed, the mcm technique and the lfm signal which were used in the multicarrier modulation high bit - rate underwater acoustic communication system was discussed in detail, the important parts in system designing were examined

    論文對水聲通道特性進行了分析，就多載波高速水聲通信系統中用到的多載波調制技術、線性調頻信號進行了詳細論述，論述了系統設計中的重要環節。
  11. An innovative and novel concept of communication sonar equation ( cse ) is introduced in the dissertation. according to the communication sonar equation ( cse ), all solutions for improving the working range of underwater communication system are fully discussed. considering the restrictions in practical application, some methods are confirmed, others are discarded

    本文從概念上創新性地提出了通信聲吶方程，並根據通信聲吶方程全面剖析了增加水聲通信系統作用距離的各種可能途徑，然後結合實際應用的要求確定了本研究具體可採用的措施並加以實現。
  12. Then, introducing something about spread spectrum technique. and deciding to select direct - sequence spread spectrum ( ds ) in underwater acoustic communications by comparing ds to fh according to the properties of underwater acoustic channels. after that, discussing something about rake receiver, simulating the path - search algorithms, synchronization circuits and rake receiver in low speed underwater acoustic communications and analyzing some major factors influencing the performance of systems

    然後介紹了rake接收技術的基本原理，並對rake接收系統中的路徑搜索和同步系統進行了討論和模擬分析，另外還對rake接收技術在低速水聲通信系統中的應用作了模擬分析，並討論了一些影響rake接收系統性能的主要因素。
  13. Underwater acoustic communications ( uwa ) are made difficult by the combined effect of multipath propagation and high temporal and spatial variability of the channel conditions. the fading which was caused by multipath propagation was one of the main factors influencing the performance of underwater acoustic communication systems

    水聲通道中廣泛存在的多徑傳播效應是水聲通信所面臨的主要障礙之一，由多徑所產生的信號衰落效應是影響水聲通信系統性能的主要因素之一。
  14. The propagation characteristics of underwater acoustic channels and their influences on long - range information transmission are studied thoroughly. based on the sonar equation, the optimal frequency band is abtained. from the calculation about transmission loss, the source level is forecasted. based on the random time varying channel theory, the fading characteristics of long - range underwater acoustic channels are analyzed

    系統、深入地研究了水聲通道特性及其對水聲遠程信息傳輸系統的影響；從聲納方程出發，確定了系統的最佳工作頻段；在聲傳播損失計算的基礎上，給出了聲源級的預報；基於時變通道理論，描述了遠程水聲通道的衰落特性。
  15. But the traditional adaptive equalizers need periodically retrained, because the underwater acoustic channel is a stochastic time - varying channel. although the traditional adaptive equalizer increase the reliability of the propagation, the rate of it is decreased. so they are not very applicable in the field of the propagation of high rate signals through an underwater acoustic channel

    但是由於水聲通道的隨機時變性，傳統的均衡技術需要周期性的發送收端已知的訓練碼來跟蹤通道的變化，這樣做雖然提高了數據傳輸的可靠性，但是系統的重復訓練大大的降低了通信效率，在水聲通道高速率數據傳輸中並不適用。
  16. This system realizes the underwater distance mobile security communication. the only shortage is the low velocity, which is result from the speciality of underwater channel and that spread spectrum need big frequency band

    採用這一技術的水聲通信實驗系統成功的進行了湖上試驗，這種技術的不足是通信速率較低，這是由於水聲通道的特殊性以及擴頻技術要佔用大量帶寬所致。
  17. So the acoustic wave is the only practical solution in this channel. an underwater acoustic channel is characterized as a multi - path channel due to signal reflections from the surface and the bottom of the sea. because of wave motion, the signal multi - path components undergo time - varying propagation delays that result in signal fading and inter - symbol interference ( isi )

    本文從分析淺海水聲通道的傳輸特性入手，針對多途徑效應引起的幅度衰落及碼間干擾問題，提出一種適用於水聲e - mail通信的十六進制（或八進制）數字頻移鍵控（ mfsk ）傳輸系統。
  18. The effect of multipath propagation commonly exists in the underwater acoustic channel and the fading which was caused by multipath propagation was the main influence factor of underwater acoustic communication system

    水聲通道中廣泛存在著多徑傳播效應。由多徑傳播引起的信號衰落現象是影響水聲通信系統性能的主要因素。
  19. In the field of underwater acoustic communications, the intersymbol interference caused by multipath effects will make the reliability and the rate of the propagation of underwater acoustic signals

    在水聲數字通信系統中，聲波傳播的多途效應會引起嚴重的碼間干擾，使水下數據傳輸的可靠性和數據傳輸速率都大大的降低。
  20. Based on the two ex isting underwater acoustic channel models ( the rice model and the rayleigh model ), we simulated the effects on the image signal underwater transmission with different ofdm parameters. by selecting appropriate ofdm parameters, we realize a simple offline communication system. besides, parts of programs based on ti tms320c62x are realized in this thesis

    本研究先根據現有的兩類水聲通道模型（萊斯衰落模型和瑞利衰落模型） ，藉助于計算機模擬，詳細考察不同的ofdm參數對于圖像信號水聲傳輸的影響，然後根據模擬的結果，選擇適當的參數實現了一個簡單的脫機（ offline ）通信系統，最後在ti公司的tms320c62x上實現部分相應的通信模塊。
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